圆

As the number of impressions increase, however,the pitch circle diameter design becomes progressively more impracticable as the runner length, which is a function of the pitch circle diameter, is also increased.

可是随着型腔数目的增加，由于流道长度是等分圆直径的函数，所以设计的流道长度随着等分圆直径的增加变得不现实。

Aim at disadvantages of traditional measuring methods,such as lower precision and complicated operations,a precise measuring method for pitch circle helix angle of involute spur gear by CMM was put forward.

针对渐开线圆柱斜齿轮分度圆螺旋角的传统测量方法精度低、操作复杂等缺陷，提出用三坐标测量机精确测量圆柱斜齿轮分度圆螺旋角的方法，介绍了其测量原理及步骤，并进行了测量精度分析。

At the same time, the essential motion in the gear grinding process and the structure of gear grinding CNC has been discussed. This method could not only applied to outer noncircular gear with all convex pitch line but also applied to outer noncircular gear with partial concave pitch line and inner noncircular gear.

把成形砂轮看作插齿刀的一个刀齿，就可以利用非圆齿轮插齿加工过程中齿廓成形原理，推导出非圆齿轮齿廓的成形砂轮展成磨削方法，同时讨论了按这一原理磨齿时需要的运动及数控机床结构。

Plainspoken, we get on this without the circle up to now this is round.

老实说，我们至今没有圆上这个这个圆。

Planar point set the minimum inclusive circle, that circle with a minimum point of the plane are all incorporated.

详细说明：平面点集的最小包容圆，即用一个最小的圆把平面内所有的点都包容在内。

If you have a point on the circle and

想想圆。如果你有一个圆上点

There are two tangent lines from a point outside the circle, the two tangent lengths are equal.

从圆外一点可以引圆的两条切线，它们的切线长相等。

The study establishes the compression of models and algorithms for vector graphics data on different basis, including on the basis of vector graphic factors of B spline curves in predecessors research; on the basis of rectangle graphic factors in main axis mode; on the basis of the application of Hough transform to polygonal line, ellipse and circle, so the study improves the models and algorithms of compression for vector graphic data.The compression for vector graphic data mainly studies the data of storing graphic factors.

本文研究的内容是：根据对以往各种曲线矢量数据压缩模型与算法的研究，建立了基于B样条的曲线矢量图形要素的数据压缩模型和算法；在前人研究的基础上，建立基于主轴模式的矩形图形要素的数据压缩模型和算法；本文作者将Hough变换应用到折线、圆及椭圆图形要素的矢量数据压缩上，在此基础上改进了基于Hough变换的折线、圆及椭圆图形要素的数据压缩模型和算法。

This paper introduces the prefabricate technology in knitting three-dimensional structure , it also studies the characteristic and application of the warp knitting structure composite composed of it.

介绍了针织三维结构预制件技术及由其组成的经编结构复合材料的结构特点和应用，指出圆机间隔结构技术的发展将对圆机的革新起到很大的促进作用

If the area of first circle is greater that the second one, print the area of first circle.

如果第一个圆的面积比第二个大，列印第一个圆的面积。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。